Abdulaa Adnan M. Synthesis of Polyurethane Based on (Resol Novolac Resin- Polyethylene Glycol) Copolymer and Their Analytical Study. JK-Physics [Internet]. 2019 Jul. 26 [cited 2024 May 18];11(1):133-47. Available from: https://journal.uokufa.edu.iq/index.php/jkp/article/view/7218